PowertrainP171B

Caution

Severity: Caution - get it checked when you can

Transmission surge solenoid valve circuit low

13 brands affected · Description from Toyota data.

Key terms: Control module: a small computer that runs one part of the car · Powertrain: engine, transmission and emissions

1What it means in plain English

The engine or powertrain control system has stored a fault that does not have specific guidance in this database yet.

2Common causes

Sensor or actuator fault
Wiring or connector fault
Vacuum or intake leak
Fuel or ignition problem
Control module fault

3Can I drive?

Caution · drive with care

Have it diagnosed promptly. If the car runs and drives normally, drive gently to a workshop. If it runs badly, stalls, overheats, loses oil pressure, or a warning light is flashing or red, stop safely and get professional help. If the code concerns the brakes, brake vacuum or brake assist, do not drive until it is checked: a hard pedal or longer stopping distance means stop.

This page gives general information. It is not professional advice. For a definite diagnosis and a repair quote, ask a qualified mechanic to inspect the car.

4Brand data 13

Brand	Code	Description	System
BYD	P171B	Gear 2/4 sensor 1 short circuit to 5V Brand	Powertrain
Chery	P171B	Reversing lamp relay low side circuit short to power Brand	Powertrain
Daewoo	P171B	No description available	Powertrain
EOBD	P171B	Avaimen poistolukitus Brand	Powertrain
GM	P171B	No description available	Powertrain
Holden	P171B	Transmission Surge Solenoid Valve Circuit Low Brand	Powertrain
Land Rover	P171B	Shift Fork A Stuck_ Movement On Shift Fork C Brand	Powertrain
Nissan	P171B	No description available	Powertrain
Opel	P171B	No description available	Powertrain
Peugeot	P171B	No description available	Powertrain
Saab	P171B	No description available	Powertrain
Toyota	P171B	Transmission surge solenoid valve circuit low Brand	Powertrain
Volkswagen	P171B	Ignition key withdrawal lock short to positive Brand	Powertrain

Legend: SAE is the generic J2012 description; Brand is text taken from that manufacturer’s data. Manufacturer rows keep the wording and language of the source data, and non-English text is tagged so screen readers pronounce it correctly.

5Extended variant codes 2

These 7-character codes are manufacturer-specific variants of P171B and may be reported by some scan tools.

Brand	Code	Description	System
Mercedes-Benz	P171B00	SCR temperature sensor symptom system plausibililty - dosing enabling by model Brand	Powertrain
Sprinter	P171B00	SCR temperature sensor symptom system plausibililty - dosing enabling by model Brand	Powertrain

6Related codes

Browse Pxxx codes or P171xx codes.